This paper presents the main stages covered in development of the safety assessment methodology for near surface Romanian repository. It also describes the modeling approaches and assumptions used in source term modeling as well as the radionuclides transport through the unsaturated and saturated zones.
In the paper, the repository performance is assessed only by the normal evolution scenario and the beginning of the institutional control period. Transport modeling through unsaturated zone emphasizes its behaviour as a natural barrier in radionuclide migration’s way. Only a brief discussion of radionuclide transport through the saturated zone is given in this paper. The discussion is related first to the model’s characteristics, followed by the presentation of the results.